Downloading https://downloads.sourceforge.net/pure-data/pd-extended/0.43.4/P Already downloaded: /Users/amirhosseinhamedanizad/Library/Caches/Homebrew/Cask/pd-extended--0.43.4.dmg ==> Verifying checksum for Cask pd-extended ==> Note: running "brew update" may fix sha256 checksum errors Error: Checksum for Cask 'pd-extended' does not match. Expected: abe7bd637b1495ad9d5a500f0a18550c1600e34ee17e60aa1a48e4dbdee59bb9 Actual: 7a07d3f7cca5c0b38ca811984ef8da536da32932d68c1a6cce33ec2462b930bf File: /Users/amirhosseinhamedanizad/Library/Caches/Homebrew/Cask/pd-extended--0.43.4.dmg To retry an incomplete download, remove the file above.